1 | /* Check that daylight is set if the last DST transition did not change offset. |
2 | Copyright (C) 2023-2024 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <errno.h> |
20 | #include <stdlib.h> |
21 | #include <support/check.h> |
22 | #include <time.h> |
23 | |
24 | /* Set the specified time zone with error checking. */ |
25 | static void |
26 | set_timezone (const char *name) |
27 | { |
28 | TEST_VERIFY (setenv ("TZ" , name, 1) == 0); |
29 | errno = 0; |
30 | tzset (); |
31 | TEST_COMPARE (errno, 0); |
32 | } |
33 | |
34 | static int |
35 | do_test (void) |
36 | { |
37 | /* Test zone based on tz-2022g version of Africa/Tripoli. The last |
38 | DST transition coincided with a change in the standard time |
39 | offset, effectively making it a no-op. |
40 | |
41 | Africa/Tripoli Thu Oct 24 23:59:59 2013 UT |
42 | = Fri Oct 25 01:59:59 2013 CEST isdst=1 gmtoff=7200 |
43 | Africa/Tripoli Fri Oct 25 00:00:00 2013 UT |
44 | = Fri Oct 25 02:00:00 2013 EET isdst=0 gmtoff=7200 |
45 | */ |
46 | set_timezone ("XT6" ); |
47 | TEST_VERIFY (daylight != 0); |
48 | TEST_COMPARE (timezone, -7200); |
49 | |
50 | /* Check that localtime re-initializes the two variables. */ |
51 | daylight = timezone = 17; |
52 | time_t t = 844034401; |
53 | struct tm *tm = localtime (timer: &t); |
54 | TEST_VERIFY (daylight != 0); |
55 | TEST_COMPARE (timezone, -7200); |
56 | TEST_COMPARE (tm->tm_year, 96); |
57 | TEST_COMPARE (tm->tm_mon, 8); |
58 | TEST_COMPARE (tm->tm_mday, 29); |
59 | TEST_COMPARE (tm->tm_hour, 23); |
60 | TEST_COMPARE (tm->tm_min, 0); |
61 | TEST_COMPARE (tm->tm_sec, 1); |
62 | TEST_COMPARE (tm->tm_gmtoff, 3600); |
63 | TEST_COMPARE (tm->tm_isdst, 0); |
64 | |
65 | return 0; |
66 | } |
67 | |
68 | #include <support/test-driver.c> |
69 | |